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An old-fashioned single-play vinyl record rotates on a turntable at 45.0 rpm.
(a) Determine what the angular velocity?
(b) Evaluate what the period of the motion?
Two point charges of +20.0 ?C and -8.00 ?C are separated by a distance of 20.0 cm. What is the intensity of electric field E midway between these two charges
A 5.0 C charge is 10m from a -2.0C charge. What is the electrostatic force on the positive charge?
A 2.0cm X 2.0cm parallel-plate capacitor has a 2.0mm spacing. The electric field strength inside the capacitor is 1.5×10^5 V/m. how much is the charge on each plate
You push a crate across a rough floor against a constat force of friction. You first push with a force of 35N, the acceleration of the box is 0.80m/s^2; Find the mass of the box
Two plastic semicircular rods are arranged into a complete circle with radius 8.5cm. The top half has charge of +15 pC, and the bottom half has charge of -15pC. Determine the magnitude and direction of the electric field at the center of the circl..
A 3.50 kg block on a smooth tabletop is attached by a string to ahanging block of mass 2.8 k. The blocks are released from rest and allowed to move freely. (a) Find the acceleration of the blocks, and (b) find the tension in the string.
A mirror of focal length 24.2 cm creates an image with magnification %u22120.350. What is the image distance
When you look down into a swimming pool or lake, are youlikely to underestimate or overestimate its depth? Explain. How does the apparent depth vary with the viewing angle
A satellite consists of a sphere of mass 1.00 x 10^3 with two spherical "ears" on retractable booms. The ears each have a mass of 50.0 kg. what will be the angular speed
A refracting telescope has an objective lens with a focal length of 2.30 m and an eyepiece with a focal length of 3.50 cm. by what factor is the angular size of an observed object reduced
A stand fan has a circular base of radius 0.2 meter and mass of 2.3 kilogram. Find the pressure exerted by the fan on the floor
A husband buys a helium-filled anniversary balloon for his wife. The balloon has a volume of 4.3L in the warm store at 76?F. By how much has the volume decreased in liters
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